import {validDataNull} from './validate'
import sha256 from 'crypto-js/sha256';

import {ElMessage} from 'element-plus'

/**
 * 防抖函数
 * @param func 待执行的函数
 * @param wait 时间毫秒
 * @returns {(function(): void)|*}
 */
export function debounce(func, wait) {
    let timeout;

    // 返回一个包装函数，该函数在被调用时会清除现有计时器并设置新的延迟调用
    return function () {
        const context = this; // 保存当前上下文
        const args = arguments; // 保存传入的参数

        clearTimeout(timeout); // 清除现有计时器，防止上次延迟执行的操作继续执行

        // 设置新的延迟执行，wait 后执行 func
        timeout = setTimeout(function () {
            func.apply(context, args); // 执行原函数，并传入之前保存的上下文和参数
        }, wait);
    };
}

//表单序列化
export const serialize = data => {
    let list = [];
    Object.keys(data).forEach(ele => {
        list.push(`${ele}=${data[ele]}`)
    })
    return list.join('&');
};
export const getObjType = obj => {
    let toString = Object.prototype.toString;
    let map = {
        '[object Boolean]': 'boolean',
        '[object Number]': 'number',
        '[object String]': 'string',
        '[object Function]': 'function',
        '[object Array]': 'array',
        '[object Date]': 'date',
        '[object RegExp]': 'regExp',
        '[object Undefined]': 'undefined',
        '[object Null]': 'null',
        '[object Object]': 'object'
    };
    if (obj instanceof Element) {
        return 'element';
    }
    return map[toString.call(obj)];
};
/**
 * 对象深拷贝
 */
export const deepClone = data => {
    let type = getObjType(data);
    let obj;
    if (type === 'array') {
        obj = [];
    } else if (type === 'object') {
        obj = {};
    } else {
        //不再具有下一层次
        return data;
    }
    if (type === 'array') {
        for (let i = 0, len = data.length; i < len; i++) {
            obj.push(deepClone(data[i]));
        }
    } else if (type === 'object') {
        for (let key in data) {
            obj[key] = deepClone(data[key]);
        }
    }
    return obj;
};
/**
 * 设置灰度模式
 */
export const toggleGrayMode = (status) => {
    if (status) {
        document.body.className = document.body.className + ' grayMode';
    } else {
        document.body.className = document.body.className.replace(' grayMode', '');
    }
};
/**
 * 设置主题
 */
export const setTheme = (name) => {
    document.body.className = name;
}

/**
 * 加密处理
 */
export const encryption = (params) => {
    let {
        data = {},
        type,
        param,
        key
    } = params;
    let result = JSON.parse(JSON.stringify(data));
    if (type === 'Base64') {
        param.forEach(ele => {
            let val = result[ele]
            try {
                result[ele] = btoa(val);
            } catch (e) {
                console.log("e", e)
            }

        })
    } else if (type == 'Aes') {
        param.forEach(ele => {
            result[ele] = sha256(result[ele], key)
        })

    }
    return result;
};


/**
 * 浏览器判断是否全屏
 */
export const fullscreenToggle = () => {
    if (fullscreenEnable()) {
        exitFullScreen();
    } else {
        reqFullScreen();
    }
};
/**
 * esc监听全屏
 */
export const listenfullscreen = (callback) => {
    function listen() {
        callback()
    }

    document.addEventListener("fullscreenchange", function () {
        listen();
    });
    document.addEventListener("mozfullscreenchange", function () {
        listen();
    });
    document.addEventListener("webkitfullscreenchange", function () {
        listen();
    });
    document.addEventListener("msfullscreenchange", function () {
        listen();
    });
};
/**
 * 浏览器判断是否全屏
 */
export const fullscreenEnable = () => {
    let isFullscreen = document.isFullScreen || document.mozIsFullScreen || document.webkitIsFullScreen
    return isFullscreen;
}

/**
 * 浏览器全屏
 */
export const reqFullScreen = () => {
    if (document.documentElement.requestFullScreen) {
        document.documentElement.requestFullScreen();
    } else if (document.documentElement.webkitRequestFullScreen) {
        document.documentElement.webkitRequestFullScreen();
    } else if (document.documentElement.mozRequestFullScreen) {
        document.documentElement.mozRequestFullScreen();
    }
};
/**
 * 浏览器退出全屏
 */
export const exitFullScreen = () => {
    if (document.documentElement.requestFullScreen) {
        document.exitFullScreen();
    } else if (document.documentElement.webkitRequestFullScreen) {
        document.webkitCancelFullScreen();
    } else if (document.documentElement.mozRequestFullScreen) {
        document.mozCancelFullScreen();
    }
};
/**
 * 递归寻找子类的父类
 */

export const findParent = (menu, id) => {
    for (let i = 0; i < menu.length; i++) {
        if (menu[i].children.length < 1) {
            return
        }
        for (let j = 0; j < menu[i].children.length; j++) {
            if (menu[i].children[j].id === id) {
                return menu[i];
            }
            if (menu[i].children[j].children.length !== 0) {
                return findParent(menu[i].children[j].children, id);

            }
        }
    }
};
/**
 * 判断2个对象属性和值是否相等
 */

/**
 * 动态插入css
 */

export const loadStyle = url => {
    const link = document.createElement('link');
    link.type = 'text/css';
    link.rel = 'stylesheet';
    link.href = url;
    const head = document.getElementsByTagName('head')[0];
    head.appendChild(link);
};
/**
 * 判断路由是否相等
 */
export const diff = (obj1, obj2) => {
    delete obj1.close;
    let o1 = obj1 instanceof Object;
    let o2 = obj2 instanceof Object;
    if (!o1 || !o2) { /*  判断不是对象  */
        return obj1 === obj2;
    }

    if (Object.keys(obj1).length !== Object.keys(obj2).length) {
        return false;
        //Object.keys() 返回一个由对象的自身可枚举属性(key值)组成的数组,例如：数组返回下表：let arr = ["a", "b", "c"];console.log(Object.keys(arr))->0,1,2;
    }

    for (let attr in obj1) {
        let t1 = obj1[attr] instanceof Object;
        let t2 = obj2[attr] instanceof Object;
        if (t1 && t2) {
            return diff(obj1[attr], obj2[attr]);
        } else if (obj1[attr] !== obj2[attr]) {
            return false;
        }
    }
    return true;
}
/**
 * 根据字典的value显示label
 */
export const findByvalue = (dic, value) => {
    let result = '';
    if (validDataNull(dic)) return value;
    if (typeof (value) == 'string' || typeof (value) == 'number' || typeof (value) == 'boolean') {
        let index = 0;
        index = findArray(dic, value);
        if (index != -1) {
            result = dic[index].label;
        } else {
            result = value;
        }
    } else if (value instanceof Array) {
        result = [];
        let index = 0;
        value.forEach(ele => {
            index = findArray(dic, ele);
            if (index != -1) {
                result.push(dic[index].label);
            } else {
                result.push(value);
            }
        });
        result = result.toString();
    }
    return result;
};
/**
 * 根据字典的value查找对应的index
 */
export const findArray = (dic, value) => {
    for (let i = 0; i < dic.length; i++) {
        if (dic[i].value === value) {
            return i;
        }
    }
    return -1;
};
/**
 * 生成随机len位数字
 */
export const randomLenNum = (len, date) => {
    let random = '';
    random = Math.ceil(Math.random() * 100000000000000).toString().substr(0, len ? len : 4);
    if (date) random = random + Date.now();
    return random;
};
/**
 * 打开小窗口
 */
export const openWindow = (url, title, w, h) => {
    // Fixes dual-screen position                            Most browsers       Firefox
    const dualScreenLeft = window.screenLeft !== undefined ? window.screenLeft : screen.left
    const dualScreenTop = window.screenTop !== undefined ? window.screenTop : screen.top

    const width = window.innerWidth ? window.innerWidth : document.documentElement.clientWidth ? document.documentElement.clientWidth : screen.width
    const height = window.innerHeight ? window.innerHeight : document.documentElement.clientHeight ? document.documentElement.clientHeight : screen.height

    const left = ((width / 2) - (w / 2)) + dualScreenLeft
    const top = ((height / 2) - (h / 2)) + dualScreenTop
    const newWindow = window.open(url, title, 'toolbar=no, location=no, directories=no, status=no, menubar=no, scrollbars=no, resizable=yes, copyhistory=no, width=' + w + ', height=' + h + ', top=' + top + ', left=' + left)

    // Puts focus on the newWindow
    if (window.focus) {
        newWindow.focus()
    }
}


export const getScreen = (isCollapse) => {
    let result = isCollapse
    if (document.body.clientWidth <= 992) {
        result = !result
    }
    return result
}


export const downloadOssByUrl = (url, fileName) => {

    const link = document.createElement('a');
    link.href = url;
    if (fileName && fileName.length > 0) {
        link.download = fileName;
    }

    link.target = "_blank"; // 可选，如果希望在新窗口中下载文件，请取消注释此行
    link.click();
    document.removeChild(link)
}
/**
 * 文件下载
 * @param response
 * @param fileName
 * @param fileSuffix
 */
export const createDownloadFile = (response, fileName) => {
    if (response.data.type === 'application/json') {
        const reader = new FileReader()
        reader.readAsText(response.data, 'utf-8')
        reader.onload = function () {
            let data = JSON.parse(reader.result)
            if (data.code !== 500 || !data.msg || data.msg.length < 1) {
                return
            }
            ElMessage({
                message: data.msg,
                type: 'error'
            })
        }
        return
    }
    // console.log("当前下载")
    if (!fileName || fileName.preventDefault) {
        fileName = getResponseFileName(response)
    }
    let blobData = new Blob([response.data])
    if (typeof window.navigator.msSaveBlob !== 'undefined') {
        window.navigator.msSaveBlob(blobData, fileName)
    } else {
        let url = window.URL.createObjectURL(blobData)
        let link = document.createElement('a')
        link.style.display = 'none'
        link.href = url
        link.setAttribute('download', fileName)
        document.body.appendChild(link)
        link.click()
        document.body.removeChild(link) //下载完成移除元素
        window.URL.revokeObjectURL(url) //释放掉blob对象
    }
}

function getResponseFileName(response, defaultName = new Date().getTime()) {
    let contentDisposition = response.headers['Content-disposition']
    if (!contentDisposition) contentDisposition = response.headers['content-disposition']
    if (!contentDisposition) {
        return defaultName
    }
    let tempName = contentDisposition.split('=')[1]
    return window.decodeURIComponent(tempName, 'UTF-8')
}
